CVE-2017-12233

HIGH7.5

CISA KEV

Published 2017-09-29 · Updated 2026-06-17 · Source psirt@cisco.com

Summary

CVE-2017-12233 is a high-severity (CVSS 7.5) vulnerability in Cisco IOS software. CISA added it to the Known Exploited Vulnerabilities catalog on March 3, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 24, 2022. CISA does not currently list it as used in ransomware campaigns. Cisco has 102 vulnerabilities in the KEV catalog, 7 of them linked to ransomware.

All 102 known-exploited Cisco vulnerabilities →

Description

Multiple vulnerabilities in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS 12.4 through 15.6 could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerabilities are due to the improper parsing of crafted CIP packets destined to an affected device. An attacker could exploit these vulnerabilities by sending crafted CIP packets to be processed by an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuz95334.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-20

CISA Known-Exploited Vulnerability

Product: Cisco — IOS software

Name: Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerability

Date added: 2022-03-03 · Due: 2022-03-24

Required action: Apply updates per vendor instructions.

References

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